[Tinyos-help] about two packet with the same originSeqNo in the CTP header

[Omprakash Gnawali]

On Sat, Sep 27, 2008 at 8:02 PM, jiwen zhang <zhangjiwen029 at gmail.com> wrote:
>
> Hello Omprakash :
>    Recently , I am confronted with a problem about CTP , in my application ,
> it send the data to "root" periodcally , but i find it send the same data
> two times every time , and the packets with the same originSeqNo in the CTP
> header , and another more odd problem is that when i use mica2 , there is no
> the problem , but when i use my own mote which is the same as IRIS , it will
> appear the problem . Do you know what is wrong ?
>
> This is the data i received :
> 7E 45 00 00 02 00 08 0D 00 38 00 01 00 16 00 08 00 82 04 00 02 00 0C E0 3E
> 7E  (The red font is the CTP packet , and the blue font is the  originSeqNo
> )
> 7E 45 00 00 02 00 08 0D 00 38 00 01 00 16 00 08 00 82 04 00 02 00 0C E0 3E
> 7E
> 7E 45 00 00 02 00 08 0D 00 38 00 01 00 16 00 08 01 82 04 00 02 00 0C 81 86
> 7E
> 7E 45 00 00 02 00 08 0D 00 38 00 01 00 16 00 08 01 82 04 00 02 00 0C 81 86
> 7E
> 7E 45 00 00 02 00 08 0D 00 38 00 01 00 16 00 08 02 82 04 00 02 00 0C 03 5E
> 7E
> 7E 45 00 00 02 00 08 0D 00 38 00 01 00 16 00 08 02 82 04 00 02 00 0C 03 5E
> 7E
> --

Based on the limited information you are providing, it could be that
acks are not working as well as you expect them to. Can you verify
using non-CTP experiments that acks are working reasonably well.

- om_p